If you prefer a manga that's serious love and has a good twist with matching Love Triangle :DD and complicated struggles and happenings with a very good story I definitely recommend to you this manga entitles " Moe Kare "
This has a really touching ending, A really serious love yet complicated relationship but It end up really really great. You'll worry, hurt, laugh and be excited . The story is about this girl who turn high school her first goal is to have a boy friend, when one incident happen . Someone harass her but luckily a guy save her but this boy end up kissing her without permission, Until one day her friend have a meet up with the guys in other school and she went with them. She saw this boy who looks exactly like the guy who save her she became cruel towards this guy but the boy claim that he's not what she's talking about. When she met another person a clear everything her memorable love story began, And I forgot to mention this manga also has Martial arts :DD
This is a but mature but not to revealing ^^